Maybe I'm going off on a tangent here but why didn't you pull over and chin the fucker, ram a traffic cone up his arse and pour radweld down it.
Contrary to popular belief, I'm quite a chilled person. This bloke had fire pouring out of his eyes. No way would I have stopped.
And just to re-emphasise - I hate middle lane hogs with a vengeance. In this incident the inside lane was moving slower than me and the outside faster. On reflection I think he must have been pissed off that I was leaving a reasonable gap between myself and the car in front.
Presumably I should have been driving up the arse of the car ahead.
Cunt.